feat(string_extensions): minor improvements

Author: Jens Becker

README.md

@@ -18,7 +18,6 @@ The goal is that by using this package you have to write less (repeating) and mo
 Here is an quick overview over all extensions, helper classes and widgets:
 
 - [Extensions on `String` and `String?`](#extensions-on-string-and-string)
-- [Extensions on `String?`](#extensions-on-string)
 - [Extensions on `DateTime`](#extensions-on-datetime)
 - [Extensions on `List<DateTime>`](#extensions-on-listdatetime)
 - [Extensions on `BuildContext` (Adaptive helpers)](#extensions-on-buildcontext-adaptive-helpers)
@@ -35,6 +34,11 @@ Here is an quick overview over all extensions, helper classes and widgets:
 All features with links to their page in the documentation are listed below:
 
 - ### Extensions on `String` and `String?`:
+    Note: All getters also do a null check if used on `String?`.
+    - #### [isNotBlank](https://pub.dev/documentation/fleasy/latest/fleasy/StringExtensions/isNotBlank.html)
+      Whether the string contains characters except of whitespace characters.
+    - #### [isBlank](https://pub.dev/documentation/fleasy/latest/fleasy/StringExtensions/isBlank.html)
+      Whether the string is either empty or solely made of whitespace characters.
     - #### [isEmail](https://pub.dev/documentation/fleasy/latest/fleasy/StringExtensions/isEmail.html)
       Whether the string is a valid email.
     - #### [isUrl](https://pub.dev/documentation/fleasy/latest/fleasy/StringExtensions/isUrl.html)
@@ -45,15 +49,8 @@ All features with links to their page in the documentation are listed below:
       Whether the string is a valid medium password.
     - #### [isStrongPassword](https://pub.dev/documentation/fleasy/latest/fleasy/StringExtensions/isStrongPassword.html)
       Whether the string is a valid strong password.
-  
-  
-- ### Extensions on `String?`:
-    - #### [isNotBlank](https://pub.dev/documentation/fleasy/latest/fleasy/NullableStringExtensions/isNotBlank.html)
-      Whether the string is not null nor empty.
-    - #### [isBlank](https://pub.dev/documentation/fleasy/latest/fleasy/NullableStringExtensions/isBlank.html)
-      Whether the string is null or empty.
     - #### [toNullIfBlank()](https://pub.dev/documentation/fleasy/latest/fleasy/NullableStringExtensions/toNullIfBlank.html)
-      Returns null if the string is blank (empty or null) or it's text if not.
+      Returns null if the string `isBlank` or it's text if it `isNotBlank`.
 
 
 - ### Extensions on `DateTime`:

lib/src/extensions/string_extensions.dart

@@ -13,6 +13,12 @@ final RegExp _strongPasswordRegExp =
     RegExp(r'^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[\W_])\S{8,}$');
 
 extension StringExtensions on String {
+  /// Whether the string contains characters except of whitespace characters.
+  bool get isNotBlank => trim().isNotEmpty;
+
+  /// Whether the string is either empty or solely made of whitespace characters.
+  bool get isBlank => trim().isEmpty;
+
   /// Whether the string is a valid email.
   bool get isEmail => _emailRegExp.hasMatch(this);
 
@@ -49,13 +55,13 @@ extension StringExtensions on String {
 }
 
 extension NullableStringExtensions on String? {
-  /// Whether the string is not null nor empty.
-  bool get isNotBlank => this != null && this!.isNotEmpty;
+  /// Whether the string is not null and contains characters except of whitespace characters.
+  bool get isNotBlank => this != null && this!.trim().isNotEmpty;
 
-  /// Whether the string is null or empty.
+  /// Whether the string is either null, empty or is solely made of whitespace characters.
   bool get isBlank => !isNotBlank;
 
-  /// Returns null if the string is blank (empty or null) or it's text if not.
+  /// Returns null if the string [isBlank] or it's text if it [isNotBlank].
   String? toNullIfBlank() => isNotBlank ? this : null;
 
   /// Whether the string is not null and a valid email.
@@ -64,18 +70,24 @@ extension NullableStringExtensions on String? {
   /// Whether the string is not null and a valid url.
   bool get isUrl => this != null ? this!.isUrl : false;
 
-  /// Whether the string is a valid medium password.
+  /// Whether the string is not null and a valid easy password.
+  ///
+  /// Requirements:
+  /// - minimum 8 characters
+  /// - no whitespaces
+  bool get isEasyPassword => this != null ? this!.isEasyPassword : false;
+
+  /// Whether the string is not null and a valid medium password.
   ///
   /// Requirements:
   /// - minimum 8 characters
   /// - no whitespaces
   /// - at least 1 uppercase letter
   /// - at least 1 lowercase letter
   /// - at least 1 number
-  bool get isMediumPassword =>
-      this != null ? _mediumPasswordRegExp.hasMatch(this!) : false;
+  bool get isMediumPassword => this != null ? this!.isMediumPassword : false;
 
-  /// Whether the string is a valid strong password.
+  /// Whether the string is is not null and a valid strong password.
   ///
   /// Requirements:
   /// - minimum 8 characters
@@ -84,6 +96,5 @@ extension NullableStringExtensions on String? {
   /// - at least 1 lowercase letter
   /// - at least 1 number
   /// - at least 1 special character
-  bool get isStrongPassword =>
-      this != null ? _strongPasswordRegExp.hasMatch(this!) : false;
+  bool get isStrongPassword => this != null ? this!.isStrongPassword : false;
 }